The wear of high-carbon metal-on-metal bearings after different heat treatments.
To study the tribological performance of metal-on-metal hip joint resurfacings, the wear performance of three pairs of Co-Cr-Mo alloy samples (pins and plates) were tested in a multidirectional pin-on-plate wear machine. An 'as-cast', a single-heat-treated, and a double-heat-treated set of specimens were tested to 3 x 10(6) cycles. The two heat treatments resulted in partial and full solution of the carbides into the matrix. An increasing trend in wear rate was found from 'as-cast' to the double-heat-treated specimens. The as-cast specimens showed the lowest wear rate (1.69 x 10(-6) mm3/N m), the reduced carbide samples had the next lowest wear rate (2.1 x 10(-6) mm3/N m), while the specimens without carbides wore the most (2.41 x 10(-6) mm3/N m).
Kinbrum
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Centre for Biomechanical Engineering, School of Engineering, Durham University, Durham, UK. amy.kinbrum@durham.ac.uk
Unsworth
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D001672:Biocompatible Materials / Q000737:chemistry*; D002244:Carbon / Q000737:chemistry*; D017276:Friction; D006622:Hip Prosthesis; D006358:Hot Temperature; D008153:Lubrication; D008422:Materials Testing; D008670:Metals / Q000737:chemistry; D013499:Surface Properties; D014800:Vitallium / Q000737:chemistry*
D001672:Biocompatible Materials; D008670:Metals; D014800:Vitallium; D002244:Carbon